In a future Japan divided into several small nations after the collapse of civilization, this is a rise-to-power harem story depicting battles and adventures woven between the protagonist who has obtained the strongest level of power and several girls. The protagonist, who has time-slipped into a post-civilization-collapse future where special powers have become commonplace, takes up work as an "excavator," uncovering modern machine parts, products, metals and other items said to be relics from the mythological age based on memories and knowledge from that era. Furthermore, the protagonist encounters a beautiful girl in that land. This girl is the grown-up version of the neighbor's only daughter who was caught up in the time transfer before it happened—a young girl who adored him saying "I love you, big brother." That neighbor has become a Grand Duke ruling that land. ※Book version Volume 1 released on December 25, 2015. Book version Volume 2 released on February 25, 2016. Book version Volume 3 released on November 10, 2016.
| Word | Frequency | Difficulty |
|---|---|---|
| 原型 | 1 | 4.35 |
| 肝心 | 1 | 3.74 |
| つき合う | 1 | 4.70 |
| 食い逃げ | 1 | 5.51 |
| 軟体動物 | 1 | 5.59 |
| ぶち当たる | 1 | 5.04 |
| 抜け出す | 1 | 3.74 |
| 犠牲者 | 1 | 4.13 |
| 飛び切り | 1 | 4.55 |
| メキメキ | 1 | 4.93 |
| 新品 | 1 | 4.41 |
| おっかなびっくり | 1 | 4.70 |
| 閃き | 1 | 4.61 |
| 食い放題 | 1 | 5.83 |
| お粗末 | 1 | 4.66 |
| 済ます | 1 | 4.07 |
| 鬱憤 | 1 | 4.52 |
| 中部 | 1 | 4.96 |
| ノロ | 1 | 5.15 |
| 老若男女 | 1 | 4.61 |
| 排除 | 1 | 3.51 |
| 地雷原 | 1 | 5.23 |
| 丸出し | 1 | 4.42 |
| 対照的 | 1 | 3.99 |
| 血だらけ | 1 | 4.81 |
| アンバランス | 1 | 4.80 |
| 従事 | 1 | 4.35 |
| お構い | 1 | 4.87 |
| カウント | 1 | 4.34 |
| 巻く | 1 | 3.53 |
| のけ反る | 1 | 4.94 |
| 唇 | 1 | 3.15 |
| 映える | 1 | 4.13 |
| 神社仏閣 | 1 | 5.52 |
| 紳士的 | 1 | 4.56 |
| 灰汁 | 1 | 5.04 |
| 桐箱 | 1 | 6.19 |
| 証書 | 1 | 4.75 |
| ここの所 | 1 | 4.44 |
| 持ち前 | 1 | 4.60 |
| アーチ | 1 | 4.55 |
| 急ブレーキ | 1 | 5.11 |
| 北西部 | 1 | 4.96 |
| 狭量 | 1 | 4.90 |
| 要領 | 1 | 4.07 |
| 数分 | 1 | 3.87 |
| 壁伝い | 1 | 5.35 |
| 延び | 1 | 4.67 |
| 裏側 | 1 | 4.14 |
| 致し方ない | 1 | 4.42 |
| 食文化 | 1 | 4.86 |
| 害 | 1 | 3.94 |
| カットソー | 1 | 5.94 |
| 呻り | 1 | 4.91 |
| 根魚 | 1 | 5.16 |
| 直系 | 1 | 4.45 |
| 駆け付ける | 1 | 4.30 |
| フカフカ | 1 | 4.34 |
| 風邪っぴき | 1 | 6.55 |
| 括り | 1 | 3.98 |
| 悪影響 | 1 | 4.43 |
| 建て場 | 1 | 5.18 |
| 先決 | 1 | 4.55 |
| スッゴイ | 1 | 6.14 |
| 兄ちゃん | 1 | 3.55 |
| 口をつける | 1 | 4.75 |
| ふたを開ける | 1 | 5.93 |
| 水分 | 1 | 4.04 |
| サンキュー | 1 | 4.77 |
| 片づける | 1 | 4.48 |
| A | 1 | 3.50 |
| 覆水盆に返らず | 1 | 6.10 |
| ずんぐり | 1 | 4.99 |
| ない交ぜ | 1 | 5.04 |
| 自主 | 1 | 4.57 |
| 悩みの種 | 1 | 4.93 |
| 即座 | 1 | 5.23 |
| 愚図る | 1 | 5.21 |
| けん制 | 1 | 4.92 |
| 筋骨隆々 | 1 | 4.45 |
| 木造家屋 | 1 | 5.84 |
| 極み | 1 | 4.29 |
| 軍事演習 | 1 | 5.30 |
| 駆り出す | 1 | 4.42 |
| 節操がない | 1 | 5.79 |
| 通知 | 1 | 4.53 |
| チョー | 1 | 5.23 |
| 花火 | 1 | 4.08 |
| 最果て | 1 | 4.40 |
| 釣り人 | 1 | 5.48 |
| と言うものは | 1 | 3.72 |
| 忍ぶ | 1 | 4.41 |
| 目元 | 1 | 3.93 |
| 押し迫る | 1 | 5.74 |
| 構 | 1 | 4.93 |
| 逆側 | 1 | 4.75 |
| 紡ぐ | 1 | 3.79 |
| 継続 | 1 | 3.82 |
| 面接 | 1 | 4.31 |
| 改訂 | 1 | 5.14 |
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